Cleaning brush



FIG. 1 is a front, left perspective view of a cleaning brush showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a rear, right perspective view thereof.

In the drawings, the dot-dash-dot broken lines define the bounds of the claim and form no part of the claimed design. The evenly spaced broken lines in the drawings are for the purpose of illustrating portions of the cleaning brush which form no part of the claimed design. 

CLAIM The ornamental design for a cleaning brush, as shown and described. 